:root {
  --bg: #0b1020;
  --bg-2: #0f1530;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-solid: #131a36;
  --border: rgba(255, 255, 255, 0.09);
  --text: #e8ecf6;
  --muted: #9aa6c4;
  --primary: #6366f1;
  --primary-2: #8b5cf6;
  --accent: #22d3ee;
  --success: #34d399;
  --danger: #fb7185;
  --warn: #fbbf24;
  --radius: 16px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.7);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(139, 92, 246, 0.25), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(34, 211, 238, 0.18), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ---- Layout ---- */
.app { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }

.sidebar {
  position: sticky; top: 0; height: 100vh;
  padding: 22px 16px;
  background: rgba(10, 14, 30, 0.6);
  backdrop-filter: blur(14px);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 6px;
}
.brand { display: flex; align-items: center; gap: 12px; padding: 6px 10px 20px; }
.brand .logo {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  display: grid; place-items: center; font-weight: 800; font-size: 18px;
  box-shadow: 0 8px 20px -6px rgba(99, 102, 241, 0.8);
}
.brand b { font-size: 16px; letter-spacing: .2px; }
.brand small { display: block; color: var(--muted); font-size: 11px; font-weight: 500; }

.nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: 12px; color: var(--muted);
  font-weight: 600; font-size: 14px; cursor: pointer; border: 1px solid transparent;
  transition: .15s;
}
.nav-link:hover { color: var(--text); background: var(--panel); }
.nav-link.active {
  color: #fff; background: linear-gradient(135deg, rgba(99,102,241,.25), rgba(139,92,246,.18));
  border-color: var(--border);
}
.nav-link .ic { width: 20px; text-align: center; }
.sidebar .spacer { flex: 1; }
.sidebar .hint { font-size: 11px; color: var(--muted); padding: 10px; line-height: 1.5; border-top: 1px solid var(--border); }

.main { padding: 28px 34px 60px; max-width: 1200px; }
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 26px; }
.topbar h1 { margin: 0; font-size: 24px; letter-spacing: -.3px; }
.topbar p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

/* ---- Cards / panels ---- */
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}
.grid { display: grid; gap: 18px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-2 { grid-template-columns: 1.3fr 1fr; }

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat .label { color: var(--muted); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }
.stat .value { font-size: 28px; font-weight: 800; letter-spacing: -.5px; }
.stat .ic {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  font-size: 18px; margin-bottom: 6px;
}
.tint-indigo { background: rgba(99,102,241,.18); color: #c7d2fe; }
.tint-cyan { background: rgba(34,211,238,.16); color: #a5f3fc; }
.tint-green { background: rgba(52,211,153,.16); color: #bbf7d0; }
.tint-amber { background: rgba(251,191,36,.16); color: #fde68a; }

/* ---- Forms ---- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
label { font-size: 13px; font-weight: 600; color: var(--muted); }
input, select {
  width: 100%; padding: 12px 14px; border-radius: 12px;
  background: rgba(255,255,255,.05); border: 1px solid var(--border);
  color: var(--text); font-size: 15px; font-family: var(--font); outline: none;
  transition: .15s;
}
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.25); }
input::placeholder { color: #6b7699; }
.locked { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 12px 20px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text); font-weight: 700; font-size: 14px;
  cursor: pointer; transition: .15s; font-family: var(--font);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent; box-shadow: 0 12px 26px -10px rgba(99,102,241,.9);
}
.btn.accent { background: linear-gradient(135deg, var(--accent), #3b82f6); border-color: transparent; color: #04212b; }
.btn.ghost { background: transparent; }
.btn.danger { background: rgba(251,113,133,.15); border-color: rgba(251,113,133,.35); color: #fecdd3; }
.btn.sm { padding: 8px 13px; font-size: 13px; border-radius: 10px; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn.block { width: 100%; }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th {
  text-align: left; padding: 12px 14px; color: var(--muted); font-size: 12px;
  text-transform: uppercase; letter-spacing: .5px; border-bottom: 1px solid var(--border);
}
td { padding: 13px 14px; border-bottom: 1px solid rgba(255,255,255,.05); }
tr:hover td { background: rgba(255,255,255,.025); }
.tag {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700;
  background: rgba(99,102,241,.18); color: #c7d2fe;
}
.mono { font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 13px; }

/* ---- Barcode result ---- */
.barcode-card { text-align: center; }
.barcode-card .bcbox { background: #fff; border-radius: 14px; padding: 18px; display: inline-block; margin: 10px 0; }
.barcode-card img { display: block; max-width: 320px; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 18px; font-size: 14px; text-align: left; margin: 6px auto; max-width: 360px; }
.kv b { color: var(--muted); font-weight: 600; }

/* ---- Scanner ---- */
#reader { width: 100%; max-width: 420px; margin: 0 auto; border-radius: 14px; overflow: hidden; border: 1px solid var(--border); }
.scan-shell { text-align: center; }
.cart-item {
  display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center;
  padding: 14px; border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px;
  background: rgba(255,255,255,.03);
}
.cart-item .meta { color: var(--muted); font-size: 12px; margin-top: 3px; }
.cart-item input { width: 120px; }
.totals { display: flex; flex-direction: column; gap: 8px; font-size: 15px; }
.totals .row { display: flex; justify-content: space-between; }
.totals .grand { font-size: 22px; font-weight: 800; }

/* ---- Misc ---- */
.empty { text-align: center; color: var(--muted); padding: 40px 20px; }
.empty .big { font-size: 40px; margin-bottom: 8px; }
.section-title { font-size: 15px; font-weight: 700; margin: 0 0 14px; display: flex; align-items: center; gap: 8px; }
.muted { color: var(--muted); }
.row-actions { display: flex; gap: 8px; }
.divider { height: 1px; background: var(--border); margin: 18px 0; }

/* Toast */
#toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--panel-solid); border: 1px solid var(--border); color: var(--text);
  padding: 13px 20px; border-radius: 12px; font-weight: 600; font-size: 14px;
  box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: .25s; z-index: 999;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.success { border-color: rgba(52,211,153,.5); }
#toast.error { border-color: rgba(251,113,133,.5); }

/* Mobile */
.menu-btn { display: none; }
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; z-index: 50; left: 0; top: 0; width: 250px;
    transform: translateX(-100%); transition: .25s;
  }
  .sidebar.open { transform: translateX(0); }
  .main { padding: 18px; }
  .menu-btn { display: inline-flex; }
  .grid.cols-4 { grid-template-columns: 1fr 1fr; }
  .grid.cols-2 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .topbar h1 { font-size: 20px; }
}